Publisher's Synopsis
Excerpt from Recursive Data Types in Setl: Automatic Determination, Data Language Description, and Efficient Implementation
The semantic level of a programming language is characterized by the degree to which a programmer must pay attention to implementation details: the higher level the language, the less need be supplied and the more natural the expressibn of the algorithm. In order to facili tate the natural expression of algorithms, many high level languages free the programmer from the burden of statically typing program variables through declarative statements. In addition, data types far removed from those actually implementable via the hardware are pro vided, again to mask questions of implementation. Thus, compare the classical concordance program written in pl/i, where table handling is the programmer's responsibility, and in.
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